这是我的日历活动。来自此活动的插入数据......
第二个是我的日历适配器类，当我从sqlite获取数据时，我希望在同一天发现有多少事件以及它们属于哪些类别。
MySQLiteHelper db = new MySQLiteHelper(this);
SharedPreferences prefs = PreferenceManager.
getDefaultSharedPreferences(this);
if (!prefs.contains("insertedInDB")) {
// insert in DB
// add events in database
db.addEvent(new CalendarEvent("Birthday", "2015-11-15", "Location-House", "aa"));
//event name,event date,event location,event category
db.addEvent(new CalendarEvent("Birthday", "2015-11-15", "Location- House", "bb"));
db.addEvent(new CalendarEvent("Mobile Computing Paper", "2015-11-01", "Location- college", "bb"));
db.addEvent(new CalendarEvent("Birthday", "2015-11-01", "Location-House", "bb"));
db.addEvent(new CalendarEvent("31th December", "2015-11-30", "Party Location-House" , "cc"));
// create key in prefs
SharedPreferences.Editor editor = prefs.edit();
editor.putBoolean("insertedInDB", true);
editor.commit();
} else {
// no need to insert in db
}
CalendarAdapter.java：
import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.GregorianCalendar;
import java.util.List;
import java.util.Locale;
import android.app.Activity;
import android.content.Context;
import android.content.Intent;
import android.content.res.Resources;
import android.graphics.Color;
import android.graphics.drawable.GradientDrawable;
import android.util.TypedValue;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.LinearLayout;
import android.widget.TextView;
public class CalendarAdapter extends BaseAdapter {
private Context context;
private java.util.Calendar month;
public GregorianCalendar pmonth;
/*-----------calendar instance for previous month for getting complete view-------------------*/
public GregorianCalendar pmonthmaxset;
private GregorianCalendar selectedDate;
int firstDay;
int maxWeeknumber;
int maxP;
int calMaxP;
int lastWeekDay;
int leftDays;
int mnthlength;
BadgeView badge;
String itemvalue, curentDateString;
DateFormat df;
LinearLayout event_dateview_layout;
View first_event_date_view, second_event_date_view, third_event_date_view, fourth_event_date_view;
private ArrayList<String> items;
public static List<String> day_string;
private View previousView;
public ArrayList<CalendarEvent> event_calendar_arr;
public CalendarAdapter(Context context, GregorianCalendar monthCalendar, ArrayList<CalendarEvent> event_calendar_arr) {
this.event_calendar_arr = event_calendar_arr;
CalendarAdapter.day_string = new ArrayList<String>();
Locale.setDefault(Locale.US);
month = monthCalendar;
selectedDate = (GregorianCalendar) monthCalendar.clone();
this.context = context;
month.set(GregorianCalendar.DAY_OF_MONTH, 1);
this.items = new ArrayList<String>();
df = new SimpleDateFormat("yyyy-MM-dd", Locale.US);
curentDateString = df.format(selectedDate.getTime());
refreshDays();
}
public void setItems(ArrayList<String> items) {
for (int i = 0; i != items.size(); i++) {
if (items.get(i).length() == 1) {
items.set(i, "0" + items.get(i));
}
}
this.items = items;
}
public int getCount() {
return day_string.size();
}
public Object getItem(int position) {
return day_string.get(position);
}
public long getItemId(int position) {
return 0;
}
// create a new view for each item referenced by the Adapter
public View getView(int position, View convertView, ViewGroup parent) {
View v = convertView;
TextView dayView;
if (convertView == null) { // if it's not recycled, initialize some
// attributes
LayoutInflater vi = (LayoutInflater) context
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
v = vi.inflate(R.layout.event_date_view, parent, false);
event_dateview_layout = (LinearLayout) v.findViewById(R.id.event_dateview_layout);
first_event_date_view = v.findViewById(R.id.first_event_date_view);
second_event_date_view = v.findViewById(R.id.second_event_date_view);
third_event_date_view = v.findViewById(R.id.third_event_date_view);
fourth_event_date_view = v.findViewById(R.id.fourth_event_date_view);
}
dayView = (TextView) v.findViewById(R.id.date_text);
String[] separatedTime = day_string.get(position).split("-");
String gridvalue = separatedTime[2].replaceFirst("^0*", "");
if ((Integer.parseInt(gridvalue) > 1) && (position < firstDay)) {
dayView.setTextColor(Color.RED);
dayView.setClickable(false);
dayView.setFocusable(false);
} else if ((Integer.parseInt(gridvalue) < 7) && (position > 28)) {
dayView.setTextColor(Color.RED);
dayView.setClickable(false);
dayView.setFocusable(false);
} else {
// setting curent month's days in blue color.
dayView.setTextColor(Color.WHITE);
}
if (day_string.get(position).equals(curentDateString)) {
event_dateview_layout.setBackgroundColor(Color.RED);
} else {
v.setBackgroundColor(Color.parseColor("#343434"));
}
dayView.setText(gridvalue);
// create date string for comparison
String date = day_string.get(position);
if (date.length() == 1) {
date = "0" + date;
}
String monthStr = "" + (month.get(GregorianCalendar.MONTH) + 1);
if (monthStr.length() == 1) {
monthStr = "0" + monthStr;
}
// show icon if date is not empty and it exists in the items array
/*ImageView iw = (ImageView) v.findViewById(R.id.date_icon);
if (date.length() > 0 && items != null && items.contains(date)) {
iw.setVisibility(View.VISIBLE);
} else {
iw.setVisibility(View.GONE);
}
*/
setEventView(v, position, dayView);
return v;
}
public View setSelected(View view, int pos) {
if (previousView != null) {
previousView.setBackgroundColor(Color.parseColor("#343434"));
}
view.setBackgroundColor(Color.CYAN);
int len = day_string.size();
if (len > pos) {
if (day_string.get(pos).equals(curentDateString)) {
} else {
previousView = view;
}
}
return view;
}
public void refreshDays() {
// clear items
items.clear();
day_string.clear();
Locale.setDefault(Locale.US);
pmonth = (GregorianCalendar) month.clone();
// month start day. ie; sun, mon, etc
firstDay = month.get(GregorianCalendar.DAY_OF_WEEK);
// finding number of weeks in current month.
maxWeeknumber = month.getActualMaximum(GregorianCalendar.WEEK_OF_MONTH);
// allocating maximum row number for the gridview.
mnthlength = maxWeeknumber * 7;
maxP = getMaxP(); // previous month maximum day 31,30....
calMaxP = maxP - (firstDay - 1);// calendar offday starting 24,25 ...
/**
* Calendar instance for getting a complete gridview including the three
* month's (previous,current,next) dates.
*/
pmonthmaxset = (GregorianCalendar) pmonth.clone();
/**
* setting the start date as previous month's required date.
*/
pmonthmaxset.set(GregorianCalendar.DAY_OF_MONTH, calMaxP + 1);
/**
* filling calendar gridview.
*/
for (int n = 0; n < mnthlength; n++) {
itemvalue = df.format(pmonthmaxset.getTime());
pmonthmaxset.add(GregorianCalendar.DATE, 1);
day_string.add(itemvalue);
}
}
private int getMaxP() {
int maxP;
if (month.get(GregorianCalendar.MONTH) == month
.getActualMinimum(GregorianCalendar.MONTH)) {
pmonth.set((month.get(GregorianCalendar.YEAR) - 1),
month.getActualMaximum(GregorianCalendar.MONTH), 1);
} else {
pmonth.set(GregorianCalendar.MONTH,
month.get(GregorianCalendar.MONTH) - 1);
}
maxP = pmonth.getActualMaximum(GregorianCalendar.DAY_OF_MONTH);
return maxP;
}
public void setEventView(View v, int pos, TextView txt) {
//get array size in len
int len = CalendarEvent.event_calendar_arr.size();
for (int i = 0; i < len; i++) {
CalendarEvent cal_obj = CalendarEvent.event_calendar_arr.get(i);
//get event date
String category = cal_obj.getEventCate();
String date = cal_obj.getEventDate();
int len1 = day_string.size();
if (len1 > pos) {
if (day_string.get(pos).equals(date)) {
if ("aa".equals(category)) {
event_dateview_layout.setBackgroundColor(Color.CYAN);
} else if ("bb".equals(category)) {
event_dateview_layout.setBackgroundColor(Color.BLUE);
} else if ("cc".equals(category)) {
event_dateview_layout.setBackgroundColor(Color.GREEN);
} else if ("dd".equals(category)) {
event_dateview_layout.setBackgroundColor(Color.YELLOW);
} else if ("aa,bb".equals(category)) {
first_event_date_view.setBackgroundColor(Color.CYAN);
second_event_date_view.setBackgroundColor(Color.CYAN);
third_event_date_view.setBackgroundColor(Color.BLUE);
fourth_event_date_view.setBackgroundColor(Color.BLUE);
} else if ("bb,cc".equals(category)) {
first_event_date_view.setBackgroundColor(Color.BLUE);
second_event_date_view.setBackgroundColor(Color.BLUE);
third_event_date_view.setBackgroundColor(Color.GREEN);
fourth_event_date_view.setBackgroundColor(Color.GREEN);
} else if ("cc,dd".equals(category)) {
first_event_date_view.setBackgroundColor(Color.GREEN);
second_event_date_view.setBackgroundColor(Color.GREEN);
third_event_date_view.setBackgroundColor(Color.YELLOW);
fourth_event_date_view.setBackgroundColor(Color.YELLOW);
} else if ("aa,bb,cc".equals(category)) {
first_event_date_view.setBackgroundColor(Color.CYAN);
second_event_date_view.setBackgroundColor(Color.BLUE);
third_event_date_view.setBackgroundColor(Color.GREEN);
fourth_event_date_view.setBackgroundColor(Color.GREEN);
} else if ("bb,cc,dd".equals(category)) {
first_event_date_view.setBackgroundColor(Color.CYAN);
second_event_date_view.setBackgroundColor(Color.BLUE);
third_event_date_view.setBackgroundColor(Color.GREEN);
fourth_event_date_view.setBackgroundColor(Color.GREEN);
} else if ("aa,bb,cc,dd".equals(category)) {
first_event_date_view.setBackgroundColor(Color.CYAN);
second_event_date_view.setBackgroundColor(Color.BLUE);
third_event_date_view.setBackgroundColor(Color.GREEN);
fourth_event_date_view.setBackgroundColor(Color.YELLOW);
}
txt.setTextColor(Color.WHITE);
}
}
}
}
public void getPositionList(String date, final Activity act) {
String event_date = null;
String event_name = null;
String event_desc = null;
int len = 0;
len = CalendarEvent.event_calendar_arr.size();
for (int i = 0; i < len; i++) {
CalendarEvent cal_event = CalendarEvent.event_calendar_arr.get(i);
event_date = cal_event.getEventDate();
event_name = cal_event.getEventName();
event_desc = cal_event.getEventDesc();
if (date.equals(event_date)) {
Intent in = new Intent(context, Event.class);
in.putExtra("EVENT_DATE", event_date);
in.putExtra("EVENT_NAME", event_name);
in.putExtra("EVENT_DESC", event_desc);
context.startActivity(in);
// Toast.makeText(context, "You have event on this date: " + event_date, Toast.LENGTH_LONG).show();
// new AlertDialog.Builder(context)
// .setIcon(android.R.drawable.ic_dialog_alert)
// .setTitle("Date: " + event_date)
// .setMessage("Event: " + event_message)
// .setPositiveButton("OK", new android.content.DialogInterface.OnClickListener() {
// public void onClick(DialogInterface dialog, int which) {
// act.finish();
// }
// }).show();
// break;
}
}
}
}